Re: yet another designated router question..
One DR per multiacess subnet, and an optional BDR. Definitely not one per area. I was a reviewer of the first edition, but not the second. This question has no ideal answer, because "ethernet segment" isn't as precise as I'd like. Do bridged segments count (remember OSPF multicasts, not broadcasts)? How about multiple VLANs on the same physical segment (each will need a DR)? What if there are secondary subnets on the physical segment (results can be flaky. Avoid.)? >Hi, > >Isn't the Designated Router the one on a broadcast type domain that >all the routers decide should control the OSPF conversations to >avoid everybody doing it thus reducing traffic. If so then 'C' >would to me seem correct. As I understood it on a point to point >connection (which there may be many in an area or AS) you do not >elect a designated router. > >Teunis, >Hobart, Tasmania >Australia > > >On Friday, November 17, 2000 at 08:59:36 PM, ajwhitaker wrote: > >> On page 553 of all-in-one ccie study guide, second edition, question 25 >> states: >> There is one designated router per: >> a) workgroup >> b) area >> c) ethernet segment >> d) autonomous system >> >> The author lists the answer as (c) ethernet segment. I'm a little confused, >> because I always thought that you need one OSPF designated router per area, >> and ospf could care less what segment you are on. Can someone confirm this > > for me? _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: yet another designated router question..
yeah, that is a bit confusing. for edition #1 it's question 40 and has the same answer. In the section about Designated Routers, the term "network" is used. So I think it comes down to the definition of "ethernet segment". In the hub/router days, everything attached to a router port was a "subnet" especially since you can't have more than one interface in the same subnet. Everything that fanned out from the router port is on the same segment or wire. Now in OSPF Network Design Solutions we get closer.. it states that: "OSPF will designate a single router per multiaccess network to build adjacencies among other routers." (page 155) So here we have "multiaccess network", use that as a synonym for ethernet segment. (there are other multiaccess networks...) In that case answer "C" is correct. Unfortunately, the All-In-One didn't present it in those terms. Which is why the list always recommends more than one book . Hope that gets you closer. Kevin Wigle - Original Message - From: "ajwhitaker" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, 17 November, 2000 23:59 Subject: yet another designated router question.. > On page 553 of all-in-one ccie study guide, second edition, question 25 > states: > There is one designated router per: > a) workgroup > b) area > c) ethernet segment > d) autonomous system > > The author lists the answer as (c) ethernet segment. I'm a little confused, > because I always thought that you need one OSPF designated router per area, > and ospf could care less what segment you are on. Can someone confirm this > for me? > > _ > FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: yet another designated router question..
Hi, Isn't the Designated Router the one on a broadcast type domain that all the routers decide should control the OSPF conversations to avoid everybody doing it thus reducing traffic. If so then 'C' would to me seem correct. As I understood it on a point to point connection (which there may be many in an area or AS) you do not elect a designated router. Teunis, Hobart, Tasmania Australia On Friday, November 17, 2000 at 08:59:36 PM, ajwhitaker wrote: > On page 553 of all-in-one ccie study guide, second edition, question 25 > states: > There is one designated router per: > a) workgroup > b) area > c) ethernet segment > d) autonomous system > > The author lists the answer as (c) ethernet segment. I'm a little confused, > because I always thought that you need one OSPF designated router per area, > and ospf could care less what segment you are on. Can someone confirm this > for me? > > _ > FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > -- www.tasmail.com _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: yet another designated router question..
here is my take (though I should crack the book open): Since updates are sent only to routers on the same sire (segment) then it would be true that a DR (and BDR for that matter) is specified per eth segment. You may want to look through the explanations for ABR, ASBR and DR to clear the picture for yourself. Moe Tavakoli. --- ajwhitaker <[EMAIL PROTECTED]> wrote: > On page 553 of all-in-one ccie study guide, second > edition, question 25 > states: > There is one designated router per: > a) workgroup > b) area > c) ethernet segment > d) autonomous system > > The author lists the answer as (c) ethernet segment. > I'm a little confused, > because I always thought that you need one OSPF > designated router per area, > and ospf could care less what segment you are on. > Can someone confirm this > for me? > > _ > FAQ, list archives, and subscription info: > http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] = _ Moe __ Do You Yahoo!? Yahoo! Auctions - Buy the things you want at great prices. http://auctions.yahoo.com/ _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
yet another designated router question..
On page 553 of all-in-one ccie study guide, second edition, question 25 states: There is one designated router per: a) workgroup b) area c) ethernet segment d) autonomous system The author lists the answer as (c) ethernet segment. I'm a little confused, because I always thought that you need one OSPF designated router per area, and ospf could care less what segment you are on. Can someone confirm this for me? _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
